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| a·phe·li·on [ ə flyən ] (plural a·phe·li·a [ ə flyə ]) |
noun |
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| Definition: |
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point in orbit farthest from Sun: the point in the orbit of a planet, comet, or other astronomical object that is farthest from the Sun
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| [Mid-17th century. < modern Latin aphelium< Greek apo- "away" + hēlios "sun"] |
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 a·phe·li·an adjective |
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